Michael Kang has posted two drafts on SSRN:

Party-Based Corruption and McCutcheon v. FEC (forthcoming, Nw. U. L. Rev. Colloquy).  Abstract:

This Essay presents a group-level theory of quid pro quo corruption and re-thinks under those terms the aggregate contribution limit challenged in McCutcheon v. FEC. Traditionally, quid pro quo corruption is understood as arising between a contributor and an individual candidate, but this understanding of quid pro quo corruption as limited to individual candidates, each isolated from one another, makes little sense given the pervasiveness of political parties in national politics and campaign finance. The aggregate limit plausibly addresses the risk of quid pro quo corruption, not only between the traditional dyad of contributor and individual candidate, but between contributor and his or her political party. Understanding the aggregate limit through this theory as a structural check on party-based, group-level corruption better captures the corruption worry about a contributor donating almost $4 million per federal election cycle than the anti-circumvention claims that pervaded the McCutcheon case. Although the group-level corruption contemplated here is less the corruption of a party than a concern about party-based corruption, the larger point is that national politics is mediated pervasively by partisan linkages — interconnecting individual candidates and officeholders — and these linkages belie an assumption that corruption is conceivable only at the level of the individual candidate.

The Year of the Super PAC (George Washington L. Rev.).  Abstract:

2012 was the year of the Super PAC. In the first presidential election cycle since their development, Super PACs raised almost one billion dollars and enabled the very wealthy to channel money into campaigning like never before during the post-Watergate era. However, still so early in the Super PAC’s evolution, 2012 offered only a taste of what comes next. Super PACs of the future will not serve merely as voice amplifiers for candidates and parties, as they typically seemed in 2012. Super PACs, and related 501(c) entities, enable very wealthy individuals to avoid the usual coordination costs of mass politics and bypass the major parties, a capacity that they will learn to exploit for their independent ends.